# This file is part of OpenDrift.
#
# OpenDrift is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 2
#
# OpenDrift is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with OpenDrift. If not, see <https://www.gnu.org/licenses/>.
#
# Copyright 2019, Knut-Frode Dagestad, MET Norway
import logging; logger = logging.getLogger(__name__)
from opendrift.models.basemodel import OpenDriftSimulation
from opendrift.elements.passivetracer import PassiveTracer
[docs]
class SeaIceDrift(OpenDriftSimulation):
"""Trajectory model based on the OpenDrift framework.
Simply propagation with ocean sea ice (this module is not for ice bergs)
Developed at MET Norway.
"""
ElementType = PassiveTracer
required_variables = {
'sea_ice_x_velocity': {'fallback': None},
'sea_ice_y_velocity': {'fallback': None},
'land_binary_mask': {'fallback': None}
}
def __init__(self, *args, **kwargs):
super(SeaIceDrift, self).__init__(*args, **kwargs)
[docs]
def update(self):
"""Update positions and properties of elements."""
# Move particles with sea ice velocity
self.advect_with_sea_ice()